1. On a class of linear integro - differential equations;Pitt;Proc Camb Phil Soc,1947
2. The linear difference - differential equation with constant coefficients Edinburgh;Wright;Proc Roy Soc,1949
3. Le quatrieme algorithme naturel Edinburgh;Lemeray;Proc Math Soc,1897
4. On a sequence defined by a non - linear recurrence formula London;Wright;J Math Soc,1945
5. Sur les racines de Fequation χ - σ de;Lomemy;Ann Math,1896